Fault
F
inding
Strata DK I&M 6/00
14-1
Fault Finding
14
This chapter describes the procedures to diagnose faults in the Strata DK14 and DK40i Key
Service Unit (KSU) as well as the DK424 and DK424i systems. Faults are classified and then
cleared by replacing the malfunctioning unit and by performing operational tests in the sequences
by prescribed by the fault clearing flowcharts in
“Fault Isolation Flowcharts” on Page 14-10
Fault Classification
A Fault Classification Flowchart is provided to ensure that fault clearing is pursued in a logical
sequence (
).
The flowcharts assume that the fault was discovered and reported by a digital or electronic
telephone user. All faults, therefore, are classified according to the way they would appear at the
digital or electronic telephone.
Fault Clearing Procedures
Before attempting to clear any fault, ensure that it is in the system and not caused by associated
external equipment, such as wiring, MOH source, etc.
Important!
Many system features are assigned, enabled or disabled using software entries as
described in the Strata DK Programming Manual. It is very important to verify that
the system programming is correct and functional before troubleshooting the
hardware.
Initialize the system (Programs 91-9 and 03) before testing new systems or when changing the
DK14 or DK40i KSU, or DK424 or DK424i processor PCBs.
Summary of Contents for Strata AirLink DK40i
Page 22: ...Introduction Related Documents Media xx Strata DK I M 6 00 ...
Page 48: ...DK14 Installation DK14 Wiring Diagrams 1 26 Strata DK I M 6 00 ...
Page 220: ...DK424 Installation Remote Cabinet Installation Instructions 5 68 Strata DK I M 6 00 ...
Page 262: ...DK424i Configuration Primary Reserve Power Cabinet Hardware 6 42 Strata DK I M 6 00 ...
Page 450: ...Universal Slot PCB Wiring Option Interface PCB Wiring Diagrams 10 42 Strata DK I M 6 00 ...
Page 592: ...Peripheral Installation Enhanced 911 Service E911 12 84 Strata DK I M 6 00 ...
Page 616: ...ACD Installation Spectrum Electronic Wall Boards 13 24 Strata DK I M 6 00 ...
Page 634: ...Fault Finding Fault Isolation Flowcharts 14 18 Strata DK I M 6 00 ...
Page 704: ...ISDN Interfaces ISDN Disconnect Cause Code 16 54 Strata DK I M 6 00 ...